A driver seat airbag apparatus includes a steering wheel and an airbag module. The steering wheel has a central hub and a rim. The rim has a shape in which a portion of the upper portion of the rim is omitted. The hub includes: a module housing part which houses the airbag module; and a cover which covers the module housing and is cleavable at the expansion pressure of the cushion. The cover includes cover doors which open at the expansion pressure of the cushion. When the cover is cleaved, the cover doors are open in the right and left diagonal upward directions when viewed from the center of the hub, while a space portion without the cover doors is formed in the direction directly above the center of the hub when viewed from the center of the hub.